High-pressure water jetters come in all shapes and sizes. There are massive trailer jetters with huge water tanks that blast out 4,000 psi at 18 gpm. There are gasoline-powered portable units that attempt to suck your garden hose dry while producing 3,000 psi. And, as we mentioned before, there are small electric jetters that push out a paltry 1,500 psi at 1.4 gpm. Since most contractors live by the maxim that time is money, why would someone voluntarily pick a unit with less power?